Okay, so the situation is this; after about an hour or so of playing on my Switch, the left joycon will begin to drift. I have removed the joycon to switch it to wireless mode and it persists. Strange thing is, it is doing the exact same thing with a pair of joycons from a different Switch unit that are working perfectly and my original ones are not having this issue on the other Switch unit. Meaning, I believe the problem to be with the software or hardware of the unit itself rather than the joycons. It has been doing this even before installing CFW. I am using firmware v10.0.4.